Here's my opinion. To start off, two things are quite obvious. Firstly, if Bionicle were to return, the sets would not be the same. And secondly, the story could be different. Let me explain, starting with sets. There have been numerous rumors about where the molds for the original Bionicle parts have ended up, but bottom line is they will never be used again in sets - even the Kanohi will probably be remolded for new heads if Bionicle returns. So, where does Lego go with this? What I can see is two options. First option is the Hero Factory molds. This has already been used with Hero Factory, Legends of Chima and the Superhero constraction figures. It's a good bet that it would be used for Bionicle's return, too. Obviously, some new armor/mask pieces would be created to differentiate it from the others - just like the different pieces used for the three (well, two) currently running constraction lines. Bottom line, though, is that the same style will most likely be used. Second option, this one less likely, is a completely new mold for Bionicle pieces. This means new limbs, new body piece, etc. TBH, it'd be nice to see limb/torso pieces that could be used with both HF and Bionicle armor pieces. But despite the beneifts of new pieces, this is quite unlikely to happen, though not impossible. So, over all, set design would be different, no question. Old masks may be used, but this seems unlikely. But, who would get featured in the sets may be the question on people's minds. Here's what I see. Again, there are two most likely options. We could get the best of the best from the previous Bionicle line - Tahu, Takanuva, etc., redesigned and revamped in a way that screams modern tech. Villains would most likely be new characters, and Titans may include giant reptilian creatures (from what we saw in the last stories of Bionicle). The problem with this is the same problem that will be explained further in the story section: old characters, new line directed (largely) towards new fans. These people wouldn't know who these characters are. Or, we could get (this one more ideal) new characters, from new Toa/Glatorian to new Matoran/Agori, the most likely would be the introduction of a new cast. Heck, the name of Bionicle may remain, with heroes, villagers, and villains that aren't what we're used to. Who knows? So, in the end, sets will be undeniably different. No question. Now, is this bad? No, not at all; not for me at least. A good reimagining of Bionicle parts could be - interesting. Let's move on to story. I see three things in this future. Let's start with this. We need to be honest with ourselves, folks - if Lego were to create a new Bionicle line, it wouldn't be (entirely) to please the old fans; it would be to draw in new fans, and get the same popular reception from before. And so, new toyline, continues with old story, but not as tied. Does this mean no ties to the old stroyline? No, not necessarily. But it would most likely be a new setting, a new introduction, etc. But this is only one option. Now, the second. This is much more unlikely; this what people want, but probably won't get. A continued storyline. This would be where the old line was completely brought back. All story elements kept, all plot the same. But there is a problem (here it comes)... new toys, old story. And it's extremely hard for new fans to draw into an old storyline. So, Lego's biggest hope may be to start with a completely new story. I know it sounds horrendous, but it's probably the best chance for Lego. And onto three. So, perhaps the greatest chance for Lego - the terrifying remake. A Bionicle that is and isn't Bionicle at the same time. This is great for new fans, but perhaps not for old fans. That's why I think Lego will probably go with the first option I stated - both a continuation and something new. That way, it will appeal to both older and newer fans, and draw in more money. This is our best chance. Now, for the last statement which fits into both categories - what will it be like? And here's my answer: Take Ninjago and Chima, put them together, and give them biomechanical bodies. There's the new Bionicle. To be frank, Bionicle's darkness will be eliminated and replaced with a kid-appealing light feeling to it. See what Lego has done recently. All of it's "custom" themes have been light and cheery (mostly), and what are the odds that something dark is going to be thrown in? Not very high. Okay, final summary. If Bionicle were to return, the story will most likely be a new story, but with ties to the old one. Will new characters be seen? Only time could tell... It would be lighter than before - maybe not Lego Friends light, but lighter. The sets are a point of controversy - it's really Lego's decision as to what are made, and it depends on the current story. Now, what would I like to see? I'd like sets totally revamped and rethought, new versions of Takanuva and Tahu, a totally dark theme aimed at collectors and die-hard fans... but hey, those chances aren't great, are they ? Also, I'd recommend watching the amazing videos by TTV in the category Bionicle: Autopsy. They are wonderful in-depth examinations of Bionicle's past and future. For this specific subject,
one is obviously the one to watch; but I would advise you to watch all of them. P.S. My basic answer to the question posted by Dorkpool is that I would want everything to return - sets, serials, and story. Also, a TV show would be epic