Clark says he can lease the back 40 acres to Ben Hubbard to cover finances. Hubbard is a character from the Superman: The Movie and Superman Returns who took over the Kent farm and cared for Martha when Clark left for Metropolis.
As Clark pointed out, Ares is indeed the Greek god of war (or more specifically, bloodlust). Ares is also a supervillan in DC comics and the archenemy of Wonder Woman.
The whole time Wes is said to be in the army, when Martha Kent hands Clark Wes' files, the folder has an Marine Corps emblem on it.
Despite claims to the contrary in previous episodes, we learn that Lionel can indeed read Kryptonian.
Tahmoh Penikett, who played Wes Keenan, also played Vince Davis in Resurrection.