“We’ll” is, of course, a conjunctive for “we will,” and it’s pronounced…actually, it depends. If you want to be absolutely correct you need to say “wheel” but many people find that too demanding. I say “wheel” from time to time but I also pronounce it as “whil,” a one-syllable thing. I also occasionally attempt a one-and-a-half-syllable thing with an emphasis on “whee.” The word is not, after all, referencing Will Scarlet or Will Penny but “we” plural. There’s also a third, even lazier group that finds even my “whil” too difficult. They pronounce it “wuhl,” as in Robert Wuhl. “Okay, wuhl be there at 4 pm” or “wuhl be okay with that” or whatever.