I would call it “DIVINE CONQUEST”:
I thought of this game mode based on what I see and like in other games. The game mode would be 5v5, on an open map and would be based on dominating control points on the map, the team that dominated the most points for the longest time (i.e. adding up the most points) would win! That would be the gist of it.
Detailing further how I thought of the game mode, I would call the points “Control Shrines”, and the team that was ahead in the match would receive benefits for this, something like relics that would confer buffs similar to those of the jungle in normal matches, and we could think about putting really powerful relics here, but maybe it would be too unbalanced...
I believe that in order to avoid the match becoming too stagnant, it would be necessary to have dynamic objectives at specific times during the match (5, 10 and 15 minutes into the match, for example), which would make players need to redeploy and not just keep checking the control points!
I think the map could have 5 control points on the edges and have the central region where the dynamic objectives would appear (certainly a strong influence for good teamfights!).
I think the mechanics of empowered minions would work well here, I think the minions would always leave their base in an attempt to take over the nearest base, and the empowered minions could be one of the buffs granted by the dynamic objectives.
Victory would be defined when a team reaches a certain amount of points, certainly being the team that has dominated the most territories for the longest amount of time. Thinking about the idea I really think it would be an extremely fun game mode that would require a lot of strategy to win, I hope you enjoy it!