No information has been released yet, but their FB's admin hinted that both Hayato and Kanna skills will receive "new reinforcement". If i'm not wrong, JMS haven't touched them for a while already right? I wonder what TWMS is going to offer this time considering they were the first server to release Hayato & Kanna's hyper skills last time. Also, they will be receiving a "huge" update on next week as well.
On a side note, CMS just received Attack on Titan crossover patch early today. Kinda quick if you ask me considering JMS just received it last week. No doubt this is happening as MapleStory is running out of updates lately this year.