As far as I can tell, Goodereader has no evidence other than the existence of the i.MX7 processor and the assumption that any new KV2 would use it.
Oh yeah

and of course the regular assumption that a new device is going to come at some point, therefore why not pin a totally random date on it and
pretend that it's based on inside information no that's apparently too imaginative.
About par the course for Goodereader, really. ZERO facts.