I think he will do alright.
Team Corona is low on the factory support ladder but are a well established respected team in the AMA paddock. It is where a lot of solid upstarts can be found. If they can mix it up with the front runners with those machines they are definitly factory material.
Ellison seems like an SBK specialist and I would love to see him stateside!
Although if he does well what factory will he go to? All the factory rides are always hogged by the same people! lol