I've been going into the last few games semi-blind, and I think I'm going to do the same with these.
By semi-blind, I mean I'll start avoiding spoilers about a month or two prior to release, though I might break that if there's a certain Pokemon I know of that I'd like to have in my party (did this with Litleo in Y- looked up where you could find it, but then avoided everything else). From there, I like to do a lot of exploring and play the game casually. It'll probably take me a few months to finish the game, since I like stretching it out, rather than rushing through the game just to say that I did.