Well, by all indications MGS V should be huge for PS4 (it'll be a big title on XB1 too, but all signs point to it tipping heavily on the PS4 side).
We can't possibly know just HOW big though, and now that UC4 is out of the picture ... it's kind of a wide open space in terms of AAA retail games for Sony when looking at the July -> December period (MLB 15 & Toukiden Kiwami are end of March, followed by FF X/X2 in early May and Batman Arkham Knight in early June - obviously this last one not an exclusive but a strongly attached franchise marketing wise, unlike I believe Mortal Kombat X in mid April which does not apepar to me to have any kind of co-marketing attached to it - but I could be wrong about that).
On one hand I can't believe they (Sony) would delay their biggest exclusive title of the year 7 months ahead of (likely) release without something nearly as big in the pipeline, but otoh I can't believe that something nearly as big as UC4 and exclusive would remain hidden 6 months before fall, with the possibility of said big exclusive(s) not being revealed until June (3 months before the start of the fall, and 4 months before the start of the Holiday season).
We are about to live in "interesting" times it seems