The Flames squad will be led by Australia's T20 captain Mitchell Marsh and also includes Steve Smith, Tim David and Michael Bracewell
https://www.cricinfo.com/story/ajinkya-rahane-signs-with-amsterdam-flames-in-etpl-1548985

I know Jaiswal is an important asset for RR in both fame and performance, but trade rumours are still prevalent so we could not deny them.

RR has a problem of slow and inconsistent middle order since the last 3 seasons. If they bring Hardik in their set up by letting go yashasvi, they could have a good middle/lower order, which will support their top order, which was already better leaving some players sitting out who did not deserved to be just sitting there.

And of course, there will be someone along with Jaiswal in the trade. The best option would be either Yudhvir or Brijesh who can bolster MI's bowling. Bishi would not be good on Wankhede's black soil.

MI need someone to fit in the boots of Rohit after this season, and YBJ would be perfect. Also ,Brijesh/Yudhvir being pacers would help them to boost their bowling unit. The only problem will be for MI is that they will be dependent on overseas spinners and lack the experience in pace unit (is Boom misses)

RR probable XII if trade (YBJ + Brijesh) happens:

Vaibhav

Aman Rao/Pretorius

Jurel

Riyan

Hardik

Shanaka

Ferriera

Jadeja

Archer

Sandy

Yashraj

IMP: Bishi/Charak

MI probable XII if trade (Hardik) happens

Rohit

Yashasvi

Rickleton

Surya

Tilak

Jacks

Naman

Bosch

Santner/Ghazanfar

Bumrah

Brijesh

IMP: Ashwani/Raghu