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