In reality . No USA . No war like we know..
So your options Saudis go to war..
Iran also renews conflict .
Others could join in But the fact is they were all pretty equal on the tech front.
So much more protracted conflict.
Hell Iran Iraq went on for 10 years .
Gulf War 1 was over before it started
Yes most likely that's how I see it
1 Iraqs Achilles heels would be its Iogistics they would not make any deep in roads into Saudi Arabia primarily because of that
2 in air Saudi's and Egyptian May shot down more Iraqi airplanes because of their superior western equipment but they cannot keep up the protracted rate of sorties like the coalition did and would not achieve total air superiority by any means.Iraq air defences will claim a lot more aircraft than in OTL
3 most likely static battles along the border with Kuwait with a gradual grinding progress for Arab coalition with frontal battles.The modern equipment still likely to be used by both sides in static battles of attrition.
4 naval blockade of Iraq but with some losses to coalition vessels to Iraqi mines and ASM equipped aircraft.Arab have modern vessels but no naval tradition.amphib assault is out of question.But even old Egyptian foxtrot would be a major threat considering it can totally blockade Iraqis only port if properly used
5 multiple separated fronts along the Iraqi saudi borders with skirmishes sporadically flaring up.With every Arab /muslim contingent starting their own front probably with minimal coordination with each other.
6 what would Yemen and jordon do ? Both have good relations with Saddam
Also Michel aoun militia in Lebanon is allied to Iraq.Just mining of red sea and straits of bab ul mandir will be huge obstacle for Egyptian navy to transfer troops equipment to Saudi Arabia.Even a small second front by Yemenis will be a major headache for Saudis
7 Iraqi scuds will target saudi cities , with coalition trying to carry out strategic bombing in Iraq with mixed results
8 Iraq will lose once its economy collapses if it does not achieve a fatal blow to Saudis in first couple of months
9 wild card is Iran what price will they extract from Saudis for not allowing Iraqi oil exports ? Iran will be the big winner with a fractured Arab world and Sunni vs Sunni fight
Iran may even covertly support iraq to prevent saudi and Egyptians from moving in and occupying the Shia southern cities alternatively they might want that to happen to encourage a shia uprising to justify their own intetvention.
10 with a lot more time to fortify and garrison Kuwait, the Iraqis will not be easily dislodged it might turn into another khorramshar for the attacking Arab coalition with weeks of urban fighting.
11 a coup in Iraq topples Saddam and another general replaces him?
12 CW use unlikely imho