What’s the big announcement???

[RailwayRoundhouse]

Hey guys, so it won't be long till the August announcements and apparently there might very well be a surprise coming within then. We've been told it's something we haven't been expecting...chances are that it's likely an engine...question is, who could it be? Some have said Diesel 10...some say Harvey...some say even the likes of Boco or Stepney! Thought I'd make this thread so we could have some fun speculating what it could be. Share what engine YOU think could be announced and why you think so!