Can anyone give me a list of costumes out and any new ones will be coming out in July?
You may identify them with this reference. Unfortunately, release of new costumes for those S1 heroes who have no costume yet has not yet been officially announced here. Expect July Masquerades to offer the same costume as was seen last month.
There are no new costumes coming out.
There are also no new costumes in Beta or even part of the V31 Beta Roadmap… so “new” costumes are not even on the near horizon.
For new content subscribe to the #beta-beat category (click that hashtag & change to “watching first post”