I wouldn't say "massively" unlikely, he'll just have to work harder for it. He is still one of the most consistent sprinters in the peloton, and he'll finish top 5 in most stages/intermediates, where others will fluctuate from 1st to 20th. Last year's course was perfect for Bennett, Bennett won almost every head to head between the 2, and Sagan got relegated from 2nd place on stage 11, but still the jersey was mathematically up for grabs on the Champs Elysees. So this year could be more of the same, which would be great.