All Bionicle pieces in LEGO Digital Designer.
But it would be very hard not to say "More Bionicle!"
Thing is, I still feel like it had a great span of time and a story that was wonderful from start to finish with a plot that finished nicely and I would NOT want it back "just because". ONLY if they had another story to tell that would be as compelling. And honestly, how do you pull this sort of thing off twice, yanno? We weren't expecting the BIG (4 million feet tall big) twist near the end, and if we go into another round expecting something that shocking again, even if they pull it off, it won't feel quite as wonderful because we'll be looking for it. I dunno. And then what if the fans don't accept that big twist the way we did the first?
The only real problem with the end IMO is that they had set people up to expect it to continue for a while more, mainly with TLR's "cliffhanger". But plotwise, there really was no reason to drag it out too long after the really big reveal. So I never got why so many seemed to be so upset about that. The moment it was announced, my reaction was, "okay, that makes sense."
What I probably would ask for though is that they seriously take the time to develop something else that might approach the same genre of storytelling as Bionicle -- adventure mystery, which I don't really feel that anything else of their stories has really been. They're adventure, and there are normal unanswered questions but that really gripping grand mystery isn't there anymore. I don't really care if they do this as a Bionicle return (though this would make sales sense given enough time, from the "parents buying for their kids" factor) or something brand new, I just want story like that associated with LEGO again if it's possible.