If folks are looking to get into old and rare breeds with a distinct connection to the Americas then I would suggest the following:
Historically the following is believed by most poultry historians:
The first fowl brought to the Americas would have been something akin to the White-faced Black Spanish and, of course, Games.
The early English colonists (remember the Spanish beat them by more than a century) most likely brought something akin to the Dorking (old 5-toed fowl) and, of course, Games.
In the Bay Colony you would have found the Dorking minus the Games. Jamestown and south you would have also found the Dorking but also the Games.
The Blue Hen of Delaware is a Blue Game hen.
Thus, in summary, the 3 fowl, for sure, you would have found in the early colonies:
White-faced Black Spanish
Dorking
Games
The Games would have been: English Games, Irish Games and Spanish Games. These three with the addition of Orientals help to make up what is now being refered to as 'American Games.' That was never a term I heard growing up (except in reference to the bantams). They were always simply refered to as Pit Games to distinguish them from Old English and Modern Games.
(All of these are found in the APA Standard except for the so called American Games).
It is important to remember that what we know as 'breeds' was much more fluid than it is today: except with Games.