It's been show many times and it happened in the main tournaments like The International. Remember the TI7, if my memory serves right, they came from the lower bracket and won the aegis with a straight 3-0.
But watching them being crushed by OG last TI, showed that they are more determined now and want to be back as the kings. Just an update, Nigma will fight against Gambit. This is also a good team to bet with but if you are a Nigma fan, of course you'll go with Kuroky.
There were some teams that really changed up roster and made their own names... Just like what happen on TNC which is my favorite where its original members are already in
GEEKfam and previous Liquid members are now NIGMA. Even the previous VP where ramzess is still there.. you can really differentiate their plays and teamwork into those original members.
Nigma vs Gambit? Nigma ofcourse but they been fucked up by Gambit by 2-0

TNC won't be the same and just like the other teams that keep on shifting and replacing their roster. I bet that many didn't expect what will be the result of Nigma's match against Gambit.
As I've said, they're also a good team.
I've been following the team but I just don't like them however I recognize how strong and good they are.