I am so ready for this. Hoping for the return of following pokemon (cries), secret bases, dive, contests, TRUMPETS, etc. Also, more mega pokemooooooon. (MEGA WAILORD LET'S DO THIS.)
One thing we're debating on reddit is whether these are mega forms for Kyogre/Groudon and I'm not totally sure-- there are definite differences (extra lines on Kyogre, black spikes on Groudon) but they're not different
enough. I'm leaning toward maybe active/passive forms like Xerneas (i.e. cosmetic glowing vs non glowing forms). Legendary megas are not unprecedented (mega mewtwo, lati@s) so we'll see.
Much more interesting to me is the yellow energy under Kyogre's skin in the closeup, the ones on its fins kind of look like the Team Aqua symbol: