Jeremiah Rogers, the "Rough Rider" Captain America of 1901 has joined Marvel: Avengers Aliiance 2 coinciding with Cap's 75th anniversary. Here's the official description of the character:
Jeremiah Rogers, known as Captain America 1901, is America's first defender of freedom from an alternate timeline who rode with Teddy Roosevelt's Rough Riders during the Spanish-American War. Armed with his iconic, extending shield, and Iso-8 powered armor he has become a symbol of American freedom, capable of safeguarding those who fight by his side.
And here's an introduction video showcasing Jeremiah Rogers's design: