Problem is we lack a decent RTS game for bronze age and antiquity that meets present-day standards. They could make AOE1 DE one of such games but they abandoned it.
Surely gameplay-wise AOE1 is something like an “AOE2 but unpolished”, but I don’t know how many players value historical settings as much as gameplay. Chariots and Knights to me are totally different, even though they might play like the exact same unit but reskined in the game (yes I know they function a little differently but I can’t find a better example).
AOM is nice but not so historical.
There is a nice open-source game called 0AD but the scope is very limited (Successors and late Roman Republic, literally around 0ad).
If the devs decide to re-juvenate the series I sincerely hope they could get back to bronze age and antiquity for at least one game, instead of, e.g. releasing three medieval RTS games in ten years.