It seems that Yankee Stadium is almost finalised for the game, but have they actually worked out how to make an RL field fit?
Sure many NFL teams share grounds with baseball fields, but an RL field is slightly longer and a lot wider than an NFL field.
By my calculations, to fit an RL field into Yankee Stadium, the field would have to be only about 92m long (+min ingoals) and about 60m wide. An NRL size field is 100m long and 68m wide.