MH didn't fared all that well. Market sector the game covered got overtaken by mobile games. They'd never survive so Disney just revoked licence.
It was developed by third party studio. They'd never shut down something developed by own branch.
All they need is to create (or buy) some studio to develop game under their curation from scratch.
I'm pretty sure Mouse could afford to sponsor and develop something on par with current gen MMOs if they'd wanted to.