What should I cosplay as to MegaCon next year?

I ask now because I want to make a costume this year and cosplays often take forever to make. A Rotom costume, a Philae costume, or a New Horizons costume? I might make a New Horizons one simply because that's recent news and it's the current probe in focus. :D Because I know how to do it, and do it right, and who better to do it than me? xD