Rituximab is also in clinical trials for MS to, I think. Not sure what phase, but if they found enough uses for a generic rituximab it might make it profitable for someone to go after a generic version.
Unfortunately, AFAIK no one is allowed still to make generic versions of biologic medications, even when off patent in the U.S. as per the FDA. The rationale is that they are too difficult to make properly.
Generics are allowed only for traditional, chemical compounds whose patents have expired. You can't get them for complex biological drugs such as hormones or antibodies used in cancer treatments. Some of the world's most potent and popular medicines fall into this biotech basket, and existing federal laws prevent them from going generic.