You're totally getting the months the products are released in mixed up, lol.
There's one booster in May and June each, as well as Random Layer 6 in May, July has a Starter and RBV7, and August has the booster.
Personally, I think we'll see Alter Chronos and Guardian Kerbeus in May as Booster and RLC6 prize respectively, Killer Deathscyther in June, and Legend Spriggan and Maximum Garuda in July as starter and RBV7 prize. gK and aC were both leaked at the same time, as were lS and mG, so it would make some sense for them to be released in the same months.
There's one booster in May and June each, as well as Random Layer 6 in May, July has a Starter and RBV7, and August has the booster.
Personally, I think we'll see Alter Chronos and Guardian Kerbeus in May as Booster and RLC6 prize respectively, Killer Deathscyther in June, and Legend Spriggan and Maximum Garuda in July as starter and RBV7 prize. gK and aC were both leaked at the same time, as were lS and mG, so it would make some sense for them to be released in the same months.