Characters

Roger Higgins
Impact Universe
American Crusaders

Joe Higgins
Impact Universe
Crusaders

Michael Barnes
Impact Universe
Successor

Shield
Possible Futures
Legends of the Dead Earth

Dynashield
Amalgam Universe
Shield/Dynamo

Comics

The Shield
(2009—2010)
10 issues

Legend of the Shield
(1991—1992)
16 issues

Red Circle: The Shield #1
(October, 2009)