On the plus side, if they DO intend to have Pine and Quinto play TOS Kirk and Spock, CBS already have a bunch of reimagined TOS uniforms and sets laying around, so they can do it on the cheap.
Better keep kelvin and tos separated, imo. If they want tos Spock, they gotta use Ethan Peck now and a Kirk recast, or it's too confusing.
Otherwise, they'd have used Quinto for Discovery too (they can make him look younger), instead of having to find a new guy that could play the discovery version of Quinto's Spock [frankly. Disco-Spock has far more in common with Quinto's Spock than Nimoy's, and it's ok because kelvin Spock is more recent so of course his 'appeal' informed the latest iteration of Spock more - just like Discovery itself is more inspired by kelvin trek than a show made in the 60s - I just find it hysterical that people argued about which one was more a clone of Nimoy or believable as tos Spock, especially those who hate Quinto's version and find him ooc. The irony.)
I think that when it comes to the general audience and the audience the movies have, they likely want to see this cast playing the kelvin characters as usual - or there is no point for them.
If you want to use the tos version of the crew, and (too soon imo) test people's interest about that, it's discovery's audience you are really trying to get on board this time and those fans most likely expect you to use Peck for that Spock. However, if you bring back Peck, that audience probably wants
that Pike too rather than new Kirk.
Basically, if they want a prime timeline movie they can only make one with the Spock and Pike from Discovery. However, I'm not sure the majority of the audience that movies have would be willing to trade a continuation of kelvin trek, thus this cast, for something about the quest stars of a TV show only available through streaming services. However popular such a show can be nowadays, it's still a big risk.
