The word merecerá is the future form of merecer in the third person singular.
See the full merecer conjugation

merecer

¿Crees que tu vida merecerá la pena ahora?
Do you think your life will be worth living now?
Oye, si ayuda a Serena, merecerá la pena.
Hey, if it helps Serena, it's worth it.
Si hizo eso, merecerá cualquier cosa que pueda pasarle.
If he did that, he will deserve anything that might happen to him.
No, pero aún así merecerá la pena.
No, but it'll still be worth your while.
Ello exigirá trabajar duro, pero merecerá la pena.
This will require hard work, but it will be well worth it.
La espera merecerá la pena, te lo prometo.
It will be worth the wait, I promise.
Al menos, tendremos un final... que merecerá una canción.
At least, we may make such an end as will be worth a song.
Sí, y aunque no lo merecía, pronto lo merecerá.
Yes, and while he didn't deserve it, he will some day soon.
Y merecerá la pena, lo prometo.
And it'll be well worth it, I promise.
No te preocupes, merecerá la pena.
Don't worry, it'll be worth the wait.
Lo prometo. Cuando llegue el momento la espera merecerá la pena.
I promise... when the time comes... it will be worth the wait.
Te lo prometo, merecerá tu tiempo.
I promise, it'll be worth your while.
Pero merecerá tenerse en cuenta cuando hablemos de los otros presupuestos rectificativos.
But it deserves to be taken into account when we speak of the other amending budgets.
Sí, pero merecerá la pena.
Yes, but it'll be worth it.
Pero aun así, merecerá la pena.
But still, it'll be worth it.
Sí, así merecerá la pena.
Yes, I will so make it worth your while.
Y merecerá la pena la espera.
And it'll be worth the wait.
De lo contrario, dicho sea con toda franqueza, la Unión no merecerá tener éxito.
Without that, quite frankly, the Union will not deserve to succeed.
Pero sé que merecerá la pena.
But I know they're worth waiting for.
Pero merecerá la pena intentarlo.
But it's gonna be worth a try.
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