WWE is always looking to lock down any name they might want to use on their programming, even if it is a three-letter name.
The company filed a trademark for “MSK” on January 4th. According to filings from the United States Patent and Trademark Office, the filing was inserted into the database on January 7th.
We have no idea how WWE is going to use MSK, but they have the name locked down, and have specifically registered it for usage that could involve in-ring action. “Entertainment services, namely, wrestling exhibitions and performances by a professional wrestler and entertainer rendered live and through broadcast media including television and radio,” was noted on the filing.
WWE has a lot of plans for the future, but they don’t typically register a trademark until just before they plan to use it. They realize that this kind of information gets out, and the company typically likes to limit the amount of time between the filing and a term’s first appearance on television.