Starting from the second week of Future Stars, grow your own talent and upgrade select Future Stars by completing FUT Future Stars Academy Objectives. FUT Future Star Academy players will have dedicated objectives that you can work through to earn four versions of their Future Star item, simulating that player's progression towards their peak.
Carniball was an event that was released back in FIFA 19 Ultimate Team but wasn’t included in last years’ edition of the game.

FIFA 21 should be getting into celebration mode with its popular “Carniball” promo, based around the world-famous Carnivals across the globe every February and March.Every year, countries like Brazil, Belgium, France, and Spain get into the festive spirit with massive Carnivals and parades, celebrating the historical season of Lent.
FIFA 21 publishers also tend to tend towards more popular clubs like Paris Saint Germain, Bayern Munich, Piemonte Calcio, LA Galaxy and Boca Juniors.
EA SPORTS selected each “Carniball” card from the eight top-class cities that celebrate the annual Carnival in February and March each year.
To celebrate, FIFA rolls out super-boosted FUT squads, with players selected from celebrating countries. In the past, we’ve seen iconic footballers like Neymar, Hugo Lloris, Franck Ribéry, and Paulo Dybala handed big upgrades — and flashy new Ultimate Team cards to boot — as part of the early year event.

“Carniball” is the celebration of Carnival around the world. - EA Sport
EA SPORTS has not yet officially confirmed anything related to Carniball 2021, but we can put together when the promo will be delivered based on the Carnivals that are taking place in a variety of European and South American countries around the world.
The “Carniball” promo is due to arrive at FIFA 21 in early March. In FIFA 19 – the last time the event ran in the game – it started on Friday March 8th and lasted a full week.

This time it should start Friday March 5th.
There is also a chance that the promo could be split into two groups, as EA recently did. That should mean a second listing on March 12th.
Last year EA SPORTS skipped the 2020 celebrations.