#5 Vettel takes two in a row
Sebastian Vettel and Lewis Hamilton traded wins during the first few races of last season, with Vettel winning last years Bahrain Grand Prix which was also the 3rd round of 2017. This year, although Mercedes are the favourite in every race, I don't see them getting to the title without adversity. Bahrain is one of those circuits where the fastest car doesn't always have its way as demonstrated last year.
Even without starting on pole, Vettel won in Australia and Bahrain last year, and if Ferrari are going to put up a challenge, Bahrain will be a major indicator. Hopefully, it won't just be due to woes on Mercedes' end like in Australia, or even like in Bahrain last year. Although this is very far in advance and we have no idea what the conditions will be like in Bahrain, I see another "Walk like an Egyptian" dance coming, very soon.