MapleStory 2, welcome.

Maybe, but it's not like the only people who are going to play MS2 are just going to be people who played the first maplestory.
I heard plenty of people who haven't played the first game who want to try out MS2.

It's not like MS2 isn't going to have the typical cycle of, "OMFG NEW GAME" -> "This game is fucking terrible" -> "I like it for [reasons]," that every new MMO has. It doesn't matter who did or did not like MS1, people will try MS2 simply because the MMO market is so stale that people will try anything regardless of their past statements/feelings.