They could still have the logo facing the same way on the helmet, but have it going the other way on all other materials. The only forward-facing logo I can think of is the Eagles. All the others face left to right. Eg. Cardinals, Falcons, Panthers, Patriots, Bills, etc.
Look at all the logos lined up next to each other at the top of http://www.nfl.com/ to see what I mean. The Eagles logo is the only one facing the other way.