IDK Maybe give Shatner a quick flashback scene? He's such a big part of the old Trek. I wouldn't think a small amount of face time in a new movie would hurt. But hey, that's me.
I loved his work as kirk but the time for a cameo.was last tome in a message to young kirk to show he was still alive post generations... now its irrelevant. This kirk's future is unwritten so no need to show a future version