Aren’t the TAS episodes literally the TOS scripts they didn’t get to do?
Notably “the soft weapon”…
(Are those Caitians? No, Kzinti!)

Anyway, given that it’s the original cast doing the voice acting, I like to think of TAS as “the rest” of TOS.
Star Trek TOS: 3 seasons
Star Trek TAS: 2 seasons
Star Trek TNG: 7 seasons
Star Trek DS9: 7 seasons
Star Trek Voy: 7 seasons
Star Trek Ent: 4 seasons
Star Trek Dis: 4 seasons
Star Trek ST: 2 seasons
Star Trek Pic: 3 seasons
Star Trek LD: ≥4 seasons
Star Trek Pro: ≥1 season
Star Trek SNW: ≥2 seasons

Hmm, what’s next? A DS9+Ent crossover show, to round out the “peak Trek nostalgia” lineup?

Personally, my pick would be to see a crew of scrappy Terrans find their way to the good lucky universe, rather than “Starfleet Academy” kids… We have Prodigy for that?