Preparing for Gen II?

So I may be getting way ahead of myself, but with the Gen II stats list, I'm wondering if it's worthwhile to start prepping now? For example, I've got a few Glooms with decent IVs, and I'm wondering if I should hold off on evolving at least one in expectation of Bellossom? I'm also wondering if with the expanded list, will everyone be able to carry more Pokemon, or will carry upgrades become worthwhile?