by Kim Filchak, Senior Reporter

The mystery is solved! The awesome folks over at schmoesknows have discovered the role Nathan Fillion (Firefly, Castle) will be playing in the upcoming film Guardians of the Galaxy, and I was right. It is totally freaking adorable.

If you wish to remain unspoiled read no further, beyond this point lay the realm of the dread SPOILERS!

According our very reliable source with intimate knowledge of this and the production has spoken exclusively to us about this and we here at Schmoes Know have our answer:

Nathan Fillion will be voicing the part of Cosmo, the psychic Russian cosmonaut dog that has appeared in the Guardians of the Galaxy comics. 

Cosmo is a telepathic Russian dog in the Marvel Comics universe. The character was created by Dan Abnett and Andy Lanning, first appeared in Nova vol. 4 #7. Within the context of the stories, Cosmo is the security chief of the spacestation Knowhere and a member of the Guardians of the Galaxy.

So, yeah. A telepathic Russian doggy astronaut/chief of security who speaks in third person. Which honestly, is so perfect I may cry.

Guardians of the Galaxy opens everywhere on August 1st.

Be sure to catch Rampant Speculation for further updates on all of the things and keep speculating along with ComicsOnline.com on Facebook and Twitter for more rumor mongering and for everything geek pop culture!