Actually anything can happen in the competition including the opportunity for Nottingham Forest to win the title, of course you don't forget how the history of Leicester City in 2016 right? well, this history will continue to be a motivation for all teams in the Premier League including small teams or new teams. I'm not saying Nottingham must be the champion this season but based on statistics they have the ability, for example a solid defense they are in the top 2 as a team that has the best defense in the Premier League it's just that they still need a great striker to increase goal activity and also as a champion candidate usually must have a player who is on the top score list.
anything can happen isn't with Nottingham winning the premier league title this season, they are not going to win the title actually, they lack what it takes in the midst of other very high competitors they have in the premier league this season, the only achievable they could likely get would be them probably finishing top five and qualifying for either the UCL or the Europa by the end of the season.