One of the Seibertron news staff has claimed that the Custom Class toy is CW Bluestreak... but I'm not sure if that might be true, as an earlier announcement from Pete was something about the Custom Class toy having an official head that hasn't been used on a Hasbro release toy yet. (either unreleased, or a TakaraTomy head)

They are also claiming that Hasbro took back the licenses because they want to do the Transformers conventions themselves and make them more family-focused like the Star Wars conventions.

So people know, the custom class this year is for CW Bluestreak.

Also, if anyone is wondering what is coming next for Botcon type events, word on the street is Hasbro wants to reapropriate this event and do it themselves. It will be more family friendly (LOTS more money that way) with them using the Star Wars Celebration as a blueprint. I am sure it will still be fun for fans (Star Wars fans love Star Wars Celebration) but there will be more activities geared towards kids. They definitely aim to turn the event in a type of attraction that way.
If true, I guess if FunPub lost the Convention license, there was no point keeping the other licenses, as the Transformers Convention license was probably their biggest money-maker (when they sell out their toys).