This is a 팬 run page. Markiplier himself (or any of his associates) do not have any correlation to this page 또는 Fanpop.
As for your question, I couldn't find anything about a meet and greet - it's still a 월 away. I'm sure 더 많이 information will come out as the 날짜 gets closer.
Other than that, I hope 당신 have fun at the show. :)