I think the production team said that once Season 1 was out of the way, familiar faces could be appearing in Discovery.
We have Sarek, Amanda and Mudd all recast. This show is set a decade before TOS so may others need recasting or actors from the Kelvin Timeline? Quinto, Cho & Urban still do TV (compared to Pegg, Pine and Saldana who are mainly doing blockbuster movies exclusively now) so having him as Spock could pull people in. Ore we could have Enterpise folk in heavy makeup to play their older selves?
Also there is the possibility of a time travel story, and recasting people as ancestors.
We have Sarek, Amanda and Mudd all recast. This show is set a decade before TOS so may others need recasting or actors from the Kelvin Timeline? Quinto, Cho & Urban still do TV (compared to Pegg, Pine and Saldana who are mainly doing blockbuster movies exclusively now) so having him as Spock could pull people in. Ore we could have Enterpise folk in heavy makeup to play their older selves?
Also there is the possibility of a time travel story, and recasting people as ancestors.