Battlefield 3 and Bad Company are two different games only thing in common is "Battlefield" Battlefield Bad Company 3 might come, but they focusing on Battlefield 3 which is the sequel to Battlefield 2 for PC not Bad Company 2
Ok you must be talking about X-Men: Destiny, from what I hear you are playing as a new mutant, who you control through the rest of game (from what I hear) so to answer your question, is no. They are trying something new instead of the linear gameplay from previous titles
When you send back the game to gamefly, thats when they will send you a game next on your list. If you have 2 games at once plan, and only one game got sent out, that means they couldn't get the other game out due to the high rental rate of the game. Just keep updating your list of games just in case you can get the top 2 that you want,
Most of the plot details are still little vague but rumors say "Agent 47 has been betrayed by his most trusted allies (again), and must take on a new and dangerous contract to uncover the truth behind the conspiracy that surrounds him" that much has been revealed.