The
Argo was so far only described in a Development Update by
Harebrained Schemes LLC for their
BattleTech (Video Game) Kickstarter project. This source does not meet the current criteria for
Canon, and is thus treated as
apocryphal at this time.
Incumbent
Line Developer Randall N. Bills explicitly stated that it was the intention for this particular game's storyline to be fully canonical. That means that if and when the finished game is released, any information it contains about the
Argo will likely be declared canonical.
So yes, the Argo looks like it will become canon. And since it is such a unique and prototype dropship, it won't make much effect on the Battletech universe. There are probably thousands of vehicles/vessels/mechs that fit into being prototypes but never moved into being anything but a test bed. They found the negatives of their designs was just too much for the positives to override.