Eleneceğine final turuna hazırlan.

The base verb is elenmek, which means to be eliminated. It is related to elemek (to eliminate), but here the person is receiving the action, not doing it.

• elemek = to eliminate someone/something
• elenmek = to be eliminated

So eleneceğine is built from elenmek, not directly from elemek.

Because in this sentence it is part of a very common Turkish pattern:

verb + -(y)acağına / -(y)eceğine + main clause

This often means instead of ... or rather than ..., especially before an instruction or suggestion.

For example:

• Şikâyet edeceğine çalış. = Instead of complaining, work.
• Korkacağına dene. = Instead of being afraid, try.

So here eleneceğine is not being understood in a simple future sense. It works idiomatically as instead of being eliminated / rather than ending up eliminated.

On the surface, it can actually be ambiguous. This form can match either:

• senin eleneceğine = that you will be eliminated / instead of your being eliminated
• onun eleneceğine = that he/she will be eliminated / instead of his/her being eliminated

In this sentence, though, the main verb is hazırlan, which is a singular command addressed to you. Because of that, the most natural reading is that eleneceğine also refers to the person being addressed: you.

This is a normal sound change in Turkish. When -acak / -ecek is followed by a vowel-initial suffix, the final k usually softens to ğ.

So:

• elenecek
• elenecek + ...
• becomes eleneceğ-...

That is why you get eleneceğine, not elenecekine or something similar.

Because final turu is a Turkish noun compound meaning final round. In this kind of compound, the second noun usually takes a possessive-looking ending:

• final turu = final round
• okul kapısı = school gate
• otobüs durağı = bus stop

Then, because hazırlanmak takes the dative case (prepare for something), the whole phrase becomes:

• final turu
  • -na → final turuna

So final turuna hazırlan means prepare for the final round.

Because the verb here is hazırlanmak, which means to get ready or to prepare oneself. That is the natural verb when you tell a person to get ready.

Compare:

• Hazırlan. = Get ready.
• Çantanı hazırla. = Prepare your bag.

So hazırla would mean prepare something, while hazırlan means get yourself ready.

Yes. Hazırlan is the second person singular imperative: a direct command to one person.

Turkish often uses the bare verb stem for this kind of command:

• gel = come
• bak = look
• hazırlan = get ready

Related forms:

• hazırlanma = don’t get ready
• hazırlanın = get ready (plural / polite)

Yes. It is normal for Turkish to put the subordinate/contrast clause first and the main command after it.

So the structure is:

• Eleneceğine = instead of being eliminated
• final turuna hazırlan = prepare for the final round

This feels quite natural in Turkish, especially in short, punchy, motivational language. The main verb also comes at the end of its clause, which is very typical for Turkish.