User blog comment:Kogath/Monster Hunter XX Discussion/@comment-26995086-20170113134258/@comment-7784930-20170114091758

3G HD came out a month after the Wii U did so not a launch title, and XX isn't even planned to come out till after the Switch is so an XXHD won't be anywhere near a launch title if they did it.

If they want a MH game on the Switch right now, it'll have to be XX (Unless you think Stories is suitable) since it's the most recent and will sell the best, but they will milk it out on the 3DS first.