I’m thinking August’s will be bigger. The background has what appears to be a base like structure, so that could be the “HQ” map going around.
The most realistic things I expect are
Isabella FT DLC with added Weapon.
Mr. Black Level Reward with Falconer Drone Gear.
Level Cap Increase.
It just occurred to me that July is skipped all together, so it would make sense that Predators content gets delivered on the month before the month that it was released.
Plus if July is skipped, that = More Time on the August Update.