Just having a quick look at seasons with returning and new players.
In seasons with both (HvsZ, GvsG, Mesopotamia, BBvsGG, Mozambique, Bhutan, Kyrgyzstan, Chile, Brazil, Dominica, 5.4.3.2.1) at least 1 returnee made it to jury questioning 9/11 times. Even though some seasons had even numbers between new and returning and BBvsGG + 5.4.3.2.1 favoured returnees it's an interesting stat.
HvsZ - 1 finalist (winner): thedarkpassanger
GvsG - 0 finalists
Mesopotamia - 1 finalist (winner): Piddu
BBvsGG - 3 finalists: Mearl, 5651Omar, thedarkpassanger
Mozambique - 0 finalists
Bhutan - 1 finalist (winner): smiley20
Kyrgyzstan - 1 finalist (2nd): Realchance
Chile - 1 finalist (winner): SimvivoRWay
Brazil - 2 finalists: Renegade628, SimvivoRWay
Dominica - 1 finalist (winner): AshlynArehart
5.4.3.2.1 - 3 finalists: thedarkpassanger, bearpatrol, LusciousLips5
Can Zed and Blue make it 10/12 seasons?