I’m not opposed to having time travel shenanigans in the game.
I don’t think dinosaurs would fit Age of Mythology. The vibe of AoM is that you have the basic human faction then spice it up with mythology and it would be weird if dinosaurs were used as that spice because dinosaurs aren’t mythology. At best, if there was going to be a time travel plot campaign a T-Rex easter egg in the corner of a map could be cute, but I would not want dinosaurs to be a focus.
Mammoths were alive recent enough I would be fine with them being in the game in more or less the same way wild elephants are.
I could see a time travel plot as a way to justify a more modern pantheon. Like some people have requested a Lovecraft pantheon and I could see time travel as a way to in universe justify having steamboats/guns/etc. (I personally wouldn’t like a lovecraft pantheon because it’s not a “real” mythos like greeks or egyptians, but I could excuse the modern-ness of them).
Worshipers of Kronos summoning gunpowder units from AoE3 would be really cool to see in a campaign mission or as a blessing for AotG. It would be a crazy plot twist and would certainly get me interested in a new campaign.
Kronos was technically not the god of time, that was Chronos
This might be a nitpick and I don’t want it to distract too much from the main point of your post, but I see this a lot and it’s wrong. The distinction between a primordial god of time and the parent of the gods is a difference between Orphic cults and wider Hellenistic belief. There is not a single primary source that has the two gods existing at the same time, it is two branches of a religion of characterize the same god in different way.
Parent of the gods kronos is a god of time. It literally translates to “time”. Kronos represented the big picture change in time, he was the one that brought about the age of the titans and his defeat represented the change over to their “modern” age of the gods.
The difference in spelling is meaningless. Read enough sources and you can see the Orphic Chronos and the mainstream kronos spelled each spelled starting with a C or K, each spelled with an H for the second letter or not, and each ending with a “nos” or “nus”. Any translation will be a translation of a translation of a translation… from people with different alphabet and unknown accents, the spelling is more vibes based than a hard science. The difference in spelling is handy when comparing and contrasting Orphic vs Mainstream Hellenistic characterizations, but presenting it like there are two separate guys who could meet up and discuss their favorite ways to eat children is not based in history.
The only good source I’ve seen that even attempts to separate them comes is greek dictionaries having separate entries for Κρονος and Χρονος, though they translate to ‘time’ and ‘old fool’ which when being used to refer to god of time and main antagonist of the story they’re a part of they might as well be synonyms. You can find plenty of slightly different spellings of the names of gods, that doesn’t mean each one is a unique god to all the others.