Interest in Solo was never that big tbh, even before TLJ. I saw people, including my brother whos loved star wars his whole life, say that they didnt have much interest in a han solo movie. add to that the fact that Infinity War was out as well as Deadpool 2. I liked Solo, but even I only saw it once in the theater, compared to 6 times for TFA and 4 for TLJ. Btw, my brother really dug force awakens, didnt care much for TLJ although he appreciates its depth, and is insanely excited for TROS. I think some of you guys are under estimated how big the film is gonna do. People are curious about how this is all gonna end, and personally I think we'll see that in box office numbers.
as for Luke being dead, that still doesn't mean its the end of the skywalker saga. Ben Solo is a skywalker, and judging by what JJ has said, and form the leaks I've read, its sounding more and more to me like this is going to be a very very very satisfying conclusion to all 9 movies. its been my most hyped movie of the year all year and I wish it was december already haha.