[jveritas]

Aoun will not enter the Parliament with a majority and Hariri will have more seats than he does. If he does not join Hariri in a coalition then he has two options:

Form an opposition block in the Parliament for the next four years.

Make the worst mistake of his life which is joining the shiite block lead by Amal and terrorist group Hizballah.

[Patrick_k]

"If he does not join Hariri in a coalition then he has two options"

First there would be some consistant common grounds for that possibility to take shape.
Those common grounds would not be based on traditional feodal politics and power sharing. Lebanon is a broke country and has a vital need for stopping and fighting corruption, and for the accountability of those responsible for the countrie's $44 BN debt.
If Hariri does not share those common grounds, then your first supposition would happen very likely, not the second one.