Good game DB, we'll have another one at some point too.

Before

Mr Stranger's Heroes for Hire

58 E Shang-Chi*
SA [9] KO [4] AST [3] DFD [0]
51 R Tarantula
SA [0] KO [0] AST [0] DFD [0]
65 LE Jessica Drew@@
SA [4] KO [4] AST [0] DFD [0]
40 U Ka-Zar##
SA [0] KO [4] AST [0] DFD [0]
60 E Ravage**
SA [9] KO [4] AST [0] DFD [0]
35 R Mantis@
SA [0] KO [0] AST [0] DFD [0]
50 E Arachne#
SA [8] KO [0] AST [0] DFD [0]
60 E Ghost Rider (2099)
SA [8] KO [3] AST [0] DFD [0]

* Vault 3 pts
** Automatic Regeneration 12 pts, Pummel 10 pts
@ Pounce 15 pts
@@ Unstoppable 5 pts
# Stunning Blow 10 pts
## Streak of Luck 5 pts
Team Feat: Pounce - 15 pts
26 RPs
Upgrades: 3/12
____________________________________

After

Mr Stranger's Heroes for Hire

58 E Shang-Chi*
SA [9] KO [4] AST [3] DFD [0]
51 R Tarantula
SA [0] KO [0] AST [0] DFD [0]
65 LE Jessica Drew@@
SA [5] KO [5] AST [0] DFD [0]
40 U Ka-Zar##
SA [1] KO [4] AST [0] DFD [0]
60 E Ravage**
SA [9] KO [4] AST [0] DFD [0]
35 R Mantis@
SA [0] KO [0] AST [0] DFD [0]
50 E Arachne#
SA [11] KO [1] AST [0] DFD [0]
60 E Ghost Rider (2099)
SA [9] KO [3] AST [0] DFD [0]

* Vault 3 pts
** Automatic Regeneration 12 pts, Pummel 10 pts
@ Pounce 15 pts
@@ Unstoppable 5 pts
# Stunning Blow 10 pts
## Streak of Luck 5 pts
Team Feat: Pounce - 15 pts
36 RPs
Upgrades: 3/12
____________________________________

There are no upgrades allowed post season right?
Does that mean I can never upgrade again, or I can do it after all games are over?