Probably NOT.Not all, but some of the job's will come back from their competitors.. as they beef up production to make up for the lost Twinkie sales..
In fact the Teamsters is probably very upset about this because the business model is for FRESH DELIVERY OF FRESH BAKED GOODS. They deliver multiple times each week to high volume locations. That requires a lot of labor, and that benefits the unions.
Many of the "competitors" are delivering 'thaw and serve' product which is delivered once a week or less, that requires far less labor (fewer deliveries = fewer trucks = fewer drivers, fewer dock workers, fewer stockers).
Further, the "FRESH BAKED/FRESH DELIVERY" business model requires a lot of bakeries scattered across the nation. The "thaw & serve" model requires far fewer bakeries, can ship by train in bulk, or by semi truck to full-line grocery warehouse distributors.
This is a big blow to the Teamsters and the other unions that just lost jobs.
Take a look at the financials of other "Fresh baked/fresh delivery" companies (Flowers bakery is a good example) and you will see they are also struggling financially and currently are behind on their loan payments.