>>69335631] Bionicle Gen 3, with professional writers (who care about it) working on it without interference from corporate suits. Story and characters would have depth and a sense of mystery, however it wouldn't get overly convoluted with, no more than two Toa teams existing at the same time, and only one island, with visits to other locations being very brief. Another location could be introduced in flashbacks, but should exist only in flashbacks.
2] Hero Factory G2. Everything that was mentioned in [1] should apply here in regards to story/character depth, however the differing themes in comparison to Bionicle should be expanded upon, from things like the transition from [Island Legend] -> [Realistic Situation Without Pre-Destined Heroes], to many unused ideas/subversions that were in the story bible but never lived up to their full potential.
3] Constraction girls' theme. Would consist of more uncommon parts recolors and molds, and sets would have an aesthetic not unlike Medabots.
4] Mech theme akin to Exo-Force but with a less obvious anime inspiration (specifically when referring to the minifigures).
5] Kill Lego Friends. With Lego Unikitty coming soon, there is no reason for Friends to exist. Also getting tired of every girls-themed toy in existence focusing on friendship and "girls doing girl things." It's getting insulting.
6] Galidor G2, but as a System theme.
7] Bring back original Underground, Underwater, and Space Lego themes.