Arsenal Chelsea final ?
While that's a real possibility, Spanish teams in the Europa League are not to be underestimated. Valencia are set to be their representative there and might cause Arsenal quite a bit of trouble in that semi.
Benfica might trouble Chelsea a bit too, they're in great forum and João Félix is flying.
Arsenal-Chelsea would be way more likely than Valencia-Benfica for me, but the latter wouldn't be impossible at all. Anyway, all I care about is that whoever of Arsenal and Chelsea that would win it also finishes in the top 4 so that there won't be a fifth club in the CL next year. We could do with two of the top six missing out to avert transfer market competitiveness for the extra club and economic advantages for ourselves. The fewer English clubs there are, the larger the TV pot and two of the clubs missing out also helps us for revenue advantages otherwise in that it decreases a competitiors' revenue.