The phrase "real bombshell" refers to something surprising or shocking that has a significant impact or influence. It implies that the news or information revealed is a big deal and catches everyone off guard. Full definition
This is a real bombshell and it looks very bad on the club that the real situation with Welbeck was not revealed to fans until after the window was slammed shut. (justarsenal.com)
To begin with, nothing better than putting this year into perspective: After a first half in which we have almost exclusively dedicated ourselves to get some momentum for our 2018 productions, by the end of the year we are expected to have a good amount of real bombshells, covering all the available platforms and a wide range of genres. (blg-publishing.com)
That was the real bombshell announcement, and it is a shame that Blizzard didn't have more specifics to share. (massivelyop.com)