- MotoGP season starts Sunday
- The traditional night-time curtain raiser will be set in Qatar
- This season sees fundamental changes on the grid
- Marquez v Rossi set to reignite
(CNN)MotoGP roars back into life this weekend, against the black and gold of Qatar's desert circuit, Losail. The traditional night-time curtain raiser is always a race to savor, but this year there are some particularly juicy morsels to chew over.