The kid has a 6 on the shirt. At first I just thought Val's hair was in a ponytail (since you can't see any long hair), but if it's a flashback to SW1 that shouldn't be the case. If it's Franklin, that should be a 5, not a 6. Looks like artist error there. The taller male is definitely Johnny.
Flashback or not, at least we now know that Two In One will resolve the mystery of what happened to the Future Foundation and Richards family.