Auflösungsvertrag eines Entwicklerteams

Guten Tag,
um mit zwei Programmierern, die ein gemeinsames Projekt verlassen haben, reinen Tisch zu machen, haben wir dieses Dokument auf gesetzt. Ist es rechtsgültig? Bin ich damit sicher, dass mir alles ab August "alleine" gehört?
Danke!

===Beginn des Dokuments===

Separation Agreement

This is an agreement between
* member alpha
* member beta
in the following referred to as "team alpha" and
* member omega
in the following referred to as "member omega"

We agree on the following
* Team alpha and member omega formed a group to develop a software name "software XYZ" in August 2012. team alpha has been involved until August 2012. In August 2012 the project dissolved.
* Team alpha is aware that there is a new team building a different team around member omega. This new team is entiteld to working on a new version of "software XYZ" with a different and original design and gameplay without limitations.
* Team alpha acknowldeges that the new team can use the name "software XYZ"
* Team alpha agrees that it will not commercially use the name "software XYZ"
* Team alpha is not part of the new team, and acknowldeges that it is a different company.
* Team alpha has no share in the new company nor any legal rights associated with it.