While the movie was delayed, the film’s release date of May 2018 wasn’t pushed back.
As such, the shooting schedule, which was supposed to wrap up by mid-summer, is just finishing up now.
It wouldn’t be surprising if Lucasfilm’s plan was to reveal the title once principal photography was over, except that due to the delays, that didn’t happen until seven months before the movie’s release.
Solo (god it feels good to just call it that) has been a troubled production for the last several months following the replacing of the original directors in the middle of filming.