Hasbro have noted in the past that they'd prefer not to do a crossover of Transformers and GIJoe unless it is necessary (years down the track when both franchises have been exhausted)... but with all these other Hasbro franchises seeing big Movie formats, why not test out the MASK franchise before it has it's own movie.

A recent article for the third GIJoe Movie (expected in 2016) notes the inclusion of the Cobra Twins (Tomax and Xamot), and Matt Trakker, who is best known from the 80s cartoon M.A.S.K..

But it isn't definite though, as it has been noted that after Hasbro absorbed Kenner and its various brands (including M.A.S.K.), the character name of Matt Trakker was introduced into GIJoe (a bit like the Gobots name being absorbed into Transformers when Hasbro absorbed Tonka)... so it could have nothing to do with M.A.S.K., but wouldn't it be great to see the concept introduced in a small way to then become a spin-off movie of its own later.