Looks like the Klingons have their TNG look, and with that, they have erased Discovery. While I know I'm in the minority here but I don't hate Discovery, I just hated their Klingons and their over-the-top stories didn't help out much either. It does create another problem though, they don't line up with the TOS look.
At least for now they can just go back to Worf's original explanation of their differences from TOS to TNG:
"A canonical explanation for the change was given in a two-part storyline on Star Trek: Enterprise, in the episodes "Affliction" and "Divergence" that aired in February 2005. Attempting to replicate experiments by humans to create augmented soldiers, Klingon scientists used genetic material from human test subjects on their own people, which resulted in a viral pandemic which caused Klingons to develop human-like physical characteristics. Dr. Phlox of the Enterprise formulated a cure for the virus, but the physical alterations remained in the populace and were inherited by offspring. Phlox indicated that "some day" the physical alterations could be reversed.[29][30] The head scientist finally mentioned he would go into cranial reconstructive surgery, another nod to "restoration" of the ridges for some Klingons."