Free Servants?

Kintoki Rider is coming out in a few months, easily the best single target rider. Nobunaga in just a month who is a very solid Archer. Assassin Scathach should get a rerun this year, as well as Saber Elizabeth and Jeanne Lily.

Next year we're getting a rerun for Saber Lily and Assassin Shiki. Towards the end of the year, we should get a rerun on Irisviel/Dress of Heaven.

Then finally, in two years, we'll get a rerun on Kuro/Chloe.

Caster Liz and Santa Alter are, unfortunately, gone for good in NA.

As long as NA doesn't deviate too much from JP's schedule, the following welfares come out at the following months.

Nobunaga (March), Chacha (April), BB (May), Rider Kintoki (June), Assassin Scathach (July), Paul Bunyan (August), Rider Ishtar (August), Elizabeth Brave (Late September), Mecha Eli Mk1 or Mk2 (October, we can only choose one but stats, skills, and NP are all identical. Not sure if we can get the other during the rerun next year), Jeanne D'arc Alter Santa Lily (November) , and Altera the Sun(ta) (December).

Nobu, Kintoki, Scathach, Eli Brave, and Santa Lily are on their reruns this year so it's the last chance to get them.

In addition to new welfares next year, Saber Lily, Shiki Ryougi, and Irisviel will have their rerun's next year as well and Chloe two years from now.

https://fategrandorder.fandom.com/wiki/Category:Free_Servants#Event%20Reward%20Servant

This is free servants release schedule of JP. NA goes ~1.9 years behind of JP