Spiderman allies can take advantage of the choosen Avengers TA without the 5 pt feat cost, Since it only applys to the Avengers.. ?
yes no?

Correct. Wildcards do not need to pay the Feat cost. To a wildcard, the Thunderbolt TA is no different than any other TA they can copy.

so it can copy the thunderbolt Ta without paying the cost? :knockedou u sure?

Yes. From the Marvel FAQ:

When a character with a wildcard team ability uses the team ability of an Avenger with the Thunderbolts card, the wildcard character uses the new team ability instead of the original Avengers team ability.

Notice that it says nothing about paying any additional cost.

You are paying for the ability to copy TAs already with wildcards (built into their normal point cost).

thanks alot