No one on this forum will be able to give you a definite answer, we are all guessing and giving our opinions. My thinking is that a new Macbook Pro would come around WWDC, the last Macbook Pro update was last July. After the trashing that Apple has been getting with the Macbook Pro just lately from tech YouTubers and bloggers, i think it's safe to assume that Apple will want to at least fix the keyboard issue as soon as possible.
This years WWDC is the 30th year, that could mean nothing, however Apple have already said that the Mac Pro and a Mac Pro display will be coming in 2019. What better time to announce and update the Pro lineup than at WWDC?
Mac Pro with a new design
Mac Pro display
Macbook Pro with a redesign (including the keyboard fix)
iMac Pro (possibly) - altho i'm not really sure about this one since they updated the iMac with a spec bump not long ago.
OR if Apple needed more time they could wait until October and hold a "Pro" focused event, however i don't think they will want to wait that long.