Dear Jessie:
There will be another Ecumenical Council someday. Whether it will be a "Vatican III" or convened for some other completely different reason only God knows.
I need to inform you though that the Latin Mass has never been suppressed. The Mass that was promulgated by Pope Paul VI is a Latin Mass. Latin still is the official language of the Mass.
In fact, Vatican II never mandated the vernacular Mass. Latin was still suppose to be the norm. Vernacular Masses were only to be done when pastorally prudent and never to the exclusion of the Latin.
The Roman Missal of 1962, the so-called Tridentine Mass, will never be reinstated as the norm. Vatican II fathers called for reform of that Missal because it truly needed to be reformed.
What is more likely to happen is a revision of the Missal that will be a hybrid of the Missal of 1962 and the Missal of 2000.
I might add, that some elements the Missal of 2000 are MORE traditional and MORE ancient than the so-called Tridentine Mass.
By the way, there is no such thing as a Novus Ordo Mass. ALL Mass are officially entitled, Roman Missal of [whatever year].
If we are to use a nickname then Tridentine Mass and Vatican II Mass (or Pope Paul VI Mass) would be more appropriate. The term Novus Ordo is a term encouraged by the schismatics to disparage the Mass. ANYONE who disparages ANY Mass is a blasphemer. ALL valid Masses are Holy.
On the issue of the Roman Missal of 1962, one is allowed to attend such a Mass AS LONG AS it has been approved by the bishop. Thus SSPX Masses are forbidden, for example. The FSSP, I believe, does have approval and thus it is perfectly okay to attend their Masses.
We all need to remember, however, to have respect for all valid and licit Masses. If we attend the Mass of the Roman Missal of 1962 thinking that the current Mass (Roman Missal of 2000) is sub-standard or not holy, then we are wrong, seriously wrong, and maybe even sinning.
God Bless,
Bro. Ignatius Mary