There are currently many games in development and I find 3 of them more attractive for their strategy features. They're being developed by AAA indie studios and millions of dollars in funding. Here's a quick overview of those MMORPGs:
Crowfall: Somewhat sandbox, medieval fantasy. Factions (12 gods) and guilds battle each others in time-limited campaigns. Complex crafting, deep character customization, frequent change of characters, different types of maps (personal player-built maps, PvE, PvP). Estimated delivery: weeks
Camelot Unchained: Mostly sandbox, medieval fantasy. Three realms fight each other in an eternal war. Moving isles, block-by-block construction, in-depth crafting, extremely large-scale battles, non-mirrored classes, procedurally-generated maps. Estimated delivery: months
Dual Universe: Sandbox, sci-fi. Organizations cooperate and wage war to control the universe. Single shard universe with million(s) of players, multiple unique planets, player-built spaceships and buildings, voxel-based terrain. Estimated delivery: months
Let me know if you've questions!