Looks like Luigi is not just hunting ghosts on the 3DS.
http://www.nintendoworldreport.com/news/38907/luigis-mansion-2-arcade-spotted-in-japan
A Japanese blogger uncovered a location test of a Luigi's Mansion arcade unit in an unspecified game center in Japan.
The test lasted from October 30 to November 3, meaning the short test period has already finished. No details on how the game is played were revealed by the blogger. Be sure to keep checking Nintendo World Report on any news as to if the arcade unit does eventually go public.
I wonder what significance the Capcom emblem in the corner hasMaybe Capcom co-developed it? (going out on a limb there)