Could there be an updated Forerunner 920XT in 2015? Maybe a Forerunner 925XT or 930XT (the name is irrelevant of course).
Looking at the Forerunner 225 range:
If you look at the details behind the products (particularly the Garmin Forerunner 225) then there is overlap between the products eg the 225 is ‘better’ than the 620 in some respects.
With what is happening with the 225 and with some glaring omissions in the 920XT; I have a sneaky feeling that we may see a 925 or 930 later this year or early next.
Later this month (May 2015) I will write an opinion piece on this subject.