ARSENAL: Arsene WengerLast season: 3rdPlayer to watch: Petr Cech. Arsenal has been troubled by sub-standard goalkeeping over the past several seasons, but acquiring Cech from Chelsea should provide consistency in the back. The signing should significantly improve a glaring hole for the Gunners.Forecast: Arsenal has an outstanding group of attacking players, from Mesut Ozil to Alexis Sanchez to Santi Cazorla. But the unit hasn’t been able to pose a significant threat to the title yet. With Cech in the back finally offering some steady goalkeeping, this could be the year the Gunners put it all together for their first premiership title since 2003-04. ASTON VILLA: Tim SherwoodLast season: 17thPlayer to watch: Jordan Ayew. Aston Villa signed the 23-year-old Ghanaian national in July as a direct replacement for Christian Benteke (42 goals last three seasons), who departed for Liverpool. Ayew scored 12 goals for Lorient last season in France.Forecast: Aston Villa barely staved off relegation last year with a 17th-place finish, the latest in a string of disappointing campaigns for the Claret and Blue. And with Benteke gone, it doesn’t look like any major improvement is in order. FOLLOW THE DAILY NEWS SPORTS ON FACEBOOK. “LIKE” US HERE. BOURNEMOUTH Manager: Eddie…