Oh, joy. Another Owner's Pokémon set that goes virtually unused in the Modified format for that very reason: they're Owner's Pokémon. I'm glad there are only five LV.Xs, for a start, and I'm interested to see what these SP-Pokémon are, but I don't have high hopes for them being anything interesting. Also, assuming this set includes Dark Pokémon, expect some reprints from Team Rocket. Dark Raichu for the win.
As for the release dates...we'll undoubtedly get IFDS in November. It'll just be less a few cards - both the Shaymin, Shaymin LV.X, both Giratina, both Dialga, Regigigas and Regigigas LV.X. I also desperately hope most of the theme deck cards (excluding the ones mentioned) get put into POP Series 9, because if our IFDS ends up with three Voltorb, two Electrode, three Duskull, two Dusclops and two Ducknoir, I'll be very disappointed. I disliked several EX series expansions for exactly that reason. I mean, two Dusknoir wouldn't be a problem, nor would two Electrode or (I guess) two Dusclops. But three of the same shouldn't happen. The set list for EX Ruby & Sapphire was awful.
As for the choice to make the first Platinum set a Galactic's one...bad choice. DPt1 shoulda been Platinum, DPt2 could be Galactic's.
That's my opinions. I'll wait until we know more to make a better post, but on first information, sounding a bit "meh".