Will there be other summer units in the Part 2 of the summer event?

Simple quesion = simple answer -> you can waste now as the only summer servants you can get this year are : Tamamo,Kyo, Mordred and Anne&Marry for the first banner then Artoria, Martha and Queen Marie for the second banner which will come with the second part of the event
Edit : Also Shishou but doesn't count because free servant.
You may also save in order to get the others CE from the second banner.