While entertaining, I see nothing legal or professional about this threat.
Just more of the same. EA has the 'do whatever the hell you like' policy, as long as it keeps the money rolling in.
You'd think TSR would realize the more noise they make, the more potential damage they are doing to themselves with all this nonsense.
If TSR becomes a squeaky enough wheel in the ears of the right people, EA may be forced to drop their 'partnership'.
Eh, one could dream.