This. Game. Rocks!

anyway, some things i haven't figured out after 3 days of digging through the game and online walkthroughs....

1) Is it true that fourth weapons can't be unlocked in DW3:Xtreme Legends unless i have the original DW3?

2) Do i need to get the weapons in order? Like if i want the fifth weapon do i need to win the first four weapons first?

3) forgot my other questions...they'll come to me as soon as i go offline, it's always like that.