User blog comment:Kogath/Monster Hunter XX Discussion/@comment-6050823-20170131122009/@comment-2194133-20170131230937

If we do potentially get a 3rd trailer tomorrow (which I doubt if only to keeps hope low), we still have the new intro to look forward to.

However, intros don't seem to have a set pattern for a release date relative to the game or intro release:

MH4 Final Trailer | August 8th, 2013

MH4 Intro | August 26th, 2013

MH4 | September 14, 2013

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MH4G Final Trailer | October 4th, 2014

MH4G Intro | September 21st, 2014

MH4G | October 11th, 2014

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MHX Final Trailer | November 8th, 2015

MHX Intro | November 8th, 2015

MHX | November 28th, 2015

If were to get a final trailer tomorrow, then it would be a scenario like MH4's where the last trailer drops over a month prior to release with the intro in between that time frame. I wouldn't get too excited for tomorrow though. On or around February 22nd seems to be the sweet spot given that's when Famitsu covers its next big scoop.