Samsung's collaboration with Marvel has a new promotion in store, offering four free Avengers-themed cases when purchasing a Samsung Galaxy Note 4.

The two companies recently teamed up to create a two-part promotional video for the new Samsung Galaxy S6 flagship, and that collaboration is now expanding with a neat new offer for Galaxy Note 4 fans.

Marvel-themed merchandise has proved to be quite popular among fans, whether it consists of shoes, shirts, phone cases, backpacks, or some other items.

The promotion is only available for the U.S., however, so interested customers in other regions will not be able to take advantage of this deal. U.S. customers, meanwhile, can get a set of free Avengers-themed cases for the Samsung Galaxy Note 4 when purchasing the phablet. Samsung estimates the value of these four cases at $200, so Marvel fans may find this offer quite attractive.

The four Marvel-themed cases offered for free come with artwork related to Hulk, Iron Man, Thor, and Captain America, at least from what we can see from the promotional poster (see image above). Other characters in Marvel's lineup might make an appearance on such cases as well, but it remains unconfirmed at this point.

Samsung points out that customers who want to take advantage of this promotional offer must have their Samsung Galaxy Note 4 in hand. This means that customers will have to buy the phablet first, and then submit an Offer Claim Form to receive the four Avengers-themed cases for free. Samsung will check and approve the request within 30 days of submission, after which it will ship the free Avengers case pack.

This promotion is a limited-time offer set to expire on June 1, 2015, and only 4,300 case sets are available. For more information about this new deal from Samsung and Marvel, head over to the dedicated website at this link. As always, it's recommended to read the fine print before committing to anything, so check out the rules of this promotion here.

Considering that only 4,300 case sets are available, interested customers might want to take advantage of this deal while they can.