Is it possible that Anthem started out as a SP game?

My understanding is that the procedural planets were to go along side what we got for more "side missions" like the side planets in Mass Effect 1 that were unrelated to the main story. The primary planets like Eos would still have been hand crafted like what we got in the game because there is a lot to do on them.

I am not sure about Anthem and its original design since we know so little about the game it is easy to make arguments one way or another since there is no evidence really either way. My first reaction to Anthem when that first video was released was "this is probably the co-op game people kept asking for with Mass Effect". To me the game has always been designed for co-op so the features for a co-op game were taken into consideration when it could have hurt the game, I think the only way to know now is if a developer says that or people get that feeling in the release version.