I'd be laughing if we have a summer wave, since they already have "Makuta vs. Mata Nui" in the next comic. Chances are, Bionicle will end before summer starts. /=
And for all we know, the vehicle and pilots might not even be Bionicle brand.
As for the UCS thing, we all know Lego tried with Titan Mata Nui. Failed miserably. Do I want something like that General Grievous? Hells yes, but it ain't gonna happen for Bionicle.
Side note: I have great expectations for the new replacement if it isn't Ben 10.