I don't understand why anyone would sue. It only benefits the lawyers.
As I understood from the lawsue, it had been filled by the people who bought pre-sale tokens for 20 millions USD.
They hoped that token would significantly increase in price. Now they are angry that unlike many shitcoins (Dogdecoin, Ripple etc) WTT did not scyrocket, and want to get a compensation from GW. - but I doubt they will succeed.