maybe they could take a leaf from MCUs book - an opening flashback (or in this case alt-universe flashforward) of a CG deaged 80s Shatner (as opposed to using Shatner in his 80s). maybe it could be done for the whole TOS crew- an opening sequence set at some point in the Trek II-VI era (or shortly after) with them in the maroon uniforms on the NCC1701A - like a mini Star Trek 'VII' with Shatner, Koenig, Takei, Nichols reprising their roles with those CG mocap things but other actors portraying Spock, Bones, Scotty- CG Rogue One style. In that way the Trek V photo at the end of Beyond would be like a foreshadow to the next movie. How would it fit in the following movie though? Would have to be some interdimentonal/timetravel plot (like what they are intending for 4)
https://www.trekbbs.com/threads/shatner-still-wants-to-play-kirk.287630/page-2#post-12012562